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Finding the Fourth Proportional to 14,615.70, 20,168.42 and 8,241.92

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Solution

The fourth proportional to 14,615.70, 20,168.42 and 8,241.92 is: 11,373.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.70 : 20,168.42 = 8,241.92 : x
  2. Step 2: Convert to fraction form
    14,615.70/20,168.42 = 8,241.92/x
  3. Step 3: Cross multiply
    14,615.70x = 20,168.42 × 8,241.92
  4. Step 4: Simplify right side
    14,615.70x = 166,226,504.17
  5. Step 5: Solve for x
    x = 166,226,504.17/14,615.70
  6. Step 6: Final answer
    x = 11,373.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.